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How does the Parabolic SAR generate buy or sell signals?
The Parabolic SAR helps traders identify trend reversals, with dots below price signaling buys and above signaling sells, best used in strong trends and confirmed with volume or other indicators.
Aug 03, 2025 at 03:16 pm

Understanding the Parabolic SAR Indicator
The Parabolic SAR (Stop and Reverse) is a technical analysis tool developed by J. Welles Wilder Jr. It is primarily used to identify potential reversals in price movement and to determine entry and exit points in trending markets. The indicator appears as a series of dots placed either above or below the price candles on a chart. When the dots are below the price, it suggests an uptrend and a potential buy signal. Conversely, when the dots are above the price, it indicates a downtrend and may generate a sell signal.
The formula behind the Parabolic SAR involves an acceleration factor and an extreme point (EP), which adjusts as the trend progresses. The basic calculation for the next period’s SAR is:
SARₙₑₓₜ = SARₚᵣₑᵥ + AF × (EP – SARₚᵣₑᵥ)
Where:
- SARₙₑₓₜ is the next period’s SAR value
- SARₚᵣₑᵥ is the current SAR
- AF is the acceleration factor, typically starting at 0.02 and increasing by 0.02 each time a new EP is reached, up to a maximum of 0.20
- EP is the highest high in an uptrend or the lowest low in a downtrend
This dynamic adjustment allows the SAR to accelerate as the trend strengthens, tightening its distance to the price and potentially signaling a reversal sooner.
Generating Buy Signals with Parabolic SAR
A buy signal is generated when the Parabolic SAR dots shift from above the price candles to below them. This transition indicates that the downtrend may be ending and an uptrend could be beginning. Traders interpret this flip as a cue to enter a long position.
To confirm the signal:
- Monitor the last closing price relative to the SAR dot
- Ensure the dot has clearly moved below the candlesticks, especially below the low of the current or previous candle
- Wait for the price to close above the SAR level to reduce false signals
For example, if the SAR was above the candles during a bearish trend and then appears below the current bullish candle, especially after a green candle closes above the SAR value, this strengthens the buy indication. Some traders use additional filters such as volume spikes or alignment with moving averages to increase confidence.
Generating Sell Signals with Parabolic SAR
A sell signal occurs when the SAR dots move from below the price to above it. This shift suggests that the upward momentum is weakening and a downward reversal may be imminent.
Key considerations for a valid sell signal:
- The SAR dot must appear above the high of a candlestick
- The price should close below the SAR value to confirm the reversal
- Avoid acting on signals during sideways or choppy markets, where SAR can produce whipsaws
For instance, if the price has been rising and the SAR dots are beneath the candles, a sudden dot appearing above a red candle that closes lower than the SAR reinforces the sell trigger. Traders might pair this with resistance levels or bearish candlestick patterns like shooting stars or bearish engulfing patterns for stronger validation.
Practical Steps to Use Parabolic SAR on Trading Platforms
To apply the Parabolic SAR on popular platforms like TradingView, MetaTrader 4/5, or Binance, follow these steps:
- Open your preferred charting platform and load a cryptocurrency pair (e.g., BTC/USDT)
- Navigate to the indicators or studies section
- Search for “Parabolic SAR” and select it
- Adjust the default parameters if needed (step = 0.02, maximum = 0.20)
- Observe the dots forming relative to price action
- Enable alerts for dot crossovers if supported
On TradingView, you can even create custom alerts:
- Click on the “Alerts” button
- Choose “Create Alert”
- Set condition: “SAR crosses below close” for buy, or “SAR crosses above close” for sell
- Choose notification method (pop-up, email, webhook)
- Save the alert
Ensure your chart timeframe aligns with your strategy—shorter timeframes like 15-minute charts may generate more signals but with higher noise, while daily charts offer fewer but potentially more reliable reversals.
Managing False Signals and Market Conditions
The Parabolic SAR performs best in strong trending markets and can produce misleading signals during ranging or volatile sideways phases. Cryptocurrencies, known for sharp volatility, often experience periods where price moves lack direction, causing the SAR dots to flip frequently—this is known as whipsaw.
To reduce false signals:
- Combine SAR with a trend filter such as the ADX (Average Directional Index). An ADX value above 25 confirms a strong trend.
- Use moving averages (e.g., 50-period and 200-period) to assess the broader trend direction.
- Apply SAR only when price is clearly above or below key moving averages.
- Avoid trading SAR signals during major news events or low liquidity periods.
For example, if Bitcoin is consolidating between $60,000 and $62,000, the SAR may alternate above and below price rapidly. In such cases, refraining from action until a breakout occurs with volume confirmation is advisable.
Optimizing Parabolic SAR Settings for Crypto Assets
While the default settings (0.02 step, 0.20 max) work for many, adjusting the acceleration factor can tailor the SAR to specific crypto behaviors. Highly volatile coins like Dogecoin or Shiba Inu may benefit from a lower step (e.g., 0.01) and lower maximum (e.g., 0.10) to reduce sensitivity.
To modify settings on MetaTrader 5:
- Right-click the SAR indicator on the chart
- Select “Properties”
- Change “Step” and “Maximum” values
- Click “OK” to apply
Backtesting different configurations on historical data helps determine optimal values. For instance, testing SAR(0.01, 0.10) versus SAR(0.03, 0.30) across a 3-month Bitcoin chart can reveal which setup generates more accurate reversal signals with fewer false entries.
Frequently Asked Questions
Can Parabolic SAR be used on all cryptocurrency timeframes?
Yes, the Parabolic SAR can be applied to any timeframe, from 1-minute to weekly charts. However, its reliability increases on higher timeframes where trends are more sustained. On lower timeframes, frequent price reversals in crypto can trigger misleading signals.
Does Parabolic SAR work well with other indicators?
Absolutely. It pairs effectively with Relative Strength Index (RSI) to confirm overbought or oversold conditions during SAR reversals, or with MACD to validate momentum shifts. Using SAR alongside volume indicators also improves signal accuracy.
Why does the SAR sometimes skip candles during fast price movements?
This occurs due to the mathematical calculation—when price moves rapidly, the SAR may jump to the extreme point of the trend. This is normal behavior and reflects the indicator’s design to catch reversals quickly.
Is Parabolic SAR suitable for scalping strategies in crypto?
It can be, but with caution. Due to its lag during sudden volatility, scalpers often combine it with support/resistance levels and order flow analysis to avoid late entries. Using tighter SAR settings may improve responsiveness.
Disclaimer:info@kdj.com
The information provided is not trading advice. kdj.com does not assume any responsibility for any investments made based on the information provided in this article. Cryptocurrencies are highly volatile and it is highly recommended that you invest with caution after thorough research!
If you believe that the content used on this website infringes your copyright, please contact us immediately (info@kdj.com) and we will delete it promptly.
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